N-Aryl oxazolidinones, oxazolidinethiones, pyrrolidinones, pyrrolidines and thiazolidinones

ABSTRACT

N-aryl oxazolidinones, oxazolidinethiones, pyrrolidinones, pyrrolidines and thiazolidinones are disclosed. These compounds possess antidepressant activity.

This is a division of application Ser. No. 45,143, filed June 4, 1979, now U.S. Pat. No. 4,348,393.

The present invention relates to N-aryl oxazolidinones, oxazolidinethiones, pyrrolidinones, pyrrolidines and thiazolidinones, their process of preparation and their therapeutic application.

The compounds of the invention have the formula: ##STR1## in which the parameters (X, A, R₁) take anyone of the following values:

(a) (O,O,H), R₂ is:

either an ester group of formula --CH₂ --OCOR₃ in which R₃ is a linear or branched alkyl moiety having from 1 to 8 carbon atoms, a cyclohexyl group, a phenyl nucleus, a methoxymethyl or a phenyloxymethyl group; and R is in para position and is anyone of the following groups: n-butyloxy, methyl-3 butyloxy, cyclopentylmethoxy, cyclohexylmethoxy, cyano-2 ethoxy, cyanomethoxy, benzyloxy of formula ##STR2## in which R₄ is a hydrogen or a chlorine atom in meta position, a fluorine atom in meta or para position, or a cyano or nitro group in meta position; disubstituted para-benzyloxy group of formula ##STR3## in which R₅ is a chlorine atom or a cyano group; or an ether group of formula --CH₂ --OR₆ in which R₆ is a linear or branched alkyl group having from 1 to 5 carbon atoms, a cyclohexyl, allyl, propargyl or methoxymethyl group; and R is the methyl group in meta position, or is anyone of the following groups located in para position:

linear or branched alkyloxy having from 4 to 6 carbon atoms,

cycloalkylmethyloxy the cycloalkyl moiety of which has from 4 to 7 carbon atoms,

(methyl-1 cyclopentyl-1) methyloxy,

(cyclopentene-1 yl) methyloxy,

(cyclohexene-1 yl)methyloxy,

(butene-2) oxy,

(methyl-3 butene-2) oxy,

chloro-4 butyloxy,

cyano-2 ethoxy; cyano-3 propoxy or cyano-4 butoxy,

oxo-2 propoxy,

(oxo-4 cyclohexyl-1) methoxy,

morpholino-2 ethoxy,

N,N dimethyl amino,

(tetrahydropyranyl-4) methoxy or (tetra hydropyranyl-3) methoxy,

benzyloxy of formula ##STR4## in which R₇ is selected from the group consisting of: H, 3--Cl, 4--Cl, 3--F, 4--F, 3--I, 3--Br, 3--CF₃, 3--NO₂, 4--NO₂, 4--CN,

3-cyanobenzyloxy, the corresponding compound of formula (I) having an asymmetric carbon being isolated as a racemic mixture or as two enantiomers of formulae (Ia) and (Ib) having respectively the absolute configuration: R(-) and S(+) ##STR5##

disubstituted benzyloxy of formula ##STR6## in which R₈ is a chlorine atom, or a cyano or nitro group;

disubstituted benzyloxy of formula ##STR7## in which R₉ is a chlorine atom or a nitro group;

disubstituted benzyloxy of formula ##STR8## in which R₅ is a a chlorine atom or a cyano group;

3,5-dichlorobenzyloxy;

substituted or non substituted styryl chain of trans configuration and of formula ##STR9## in which R₁₀ is a hydrogen or chlorine atom, or a cyano or nitro group;

substituted or non substituted styryl chain of cis configuration and of formula ##STR10## in which R₁₁ is a hydrogen atom or a nitro group, ##STR11## or phenethyl chain, or

phenyl nucleus;

or an amine group of formula ##STR12## in which ##STR13## is selected from the group consisting of: --NH₂, NH--CH₃, NH--C₂ H₅, ##STR14## and R is in para position and is selected from the group consisting of:

n-butyloxy, methyl-3 butyloxy, cyclopentylmethoxy, cyclohexylmethoxy, cyanomethoxy or cyano-2 ethoxy group;

benzyloxy group of formula ##STR15## in which R₁₄ has one of the following values: H, 3--Cl, 4--F, 3--CN, 3--NO₂ ; or

disubstituted benzyloxy group of formula ##STR16## (b) (O,CH₂,H), R₂ is the hydroxymethyl group, and R is the para-(metanitro) benzyloxy group;

(c) (H₂,CH₂,H), R₂ is the hydroxymethyl group and R is the parabenzyloxy group;

(d) (O,S,H), R₂ is the methoxymethyl group and R is the para-(metanitro) benzyloxy group;

(e) (S,O,H), R₂ is:

either a hydroxymethyl group and R in para position is selected from the group consisting of:

a linear or branched alkyloxy group having from 2 to 5 carbon atoms,

a cyclopentylmethoxy, cyclohexylmethoxy, (cyclohexene-1 yl) methoxy or (tetrahydropyranyl-4) methoxy group,

a cyanomethoxy, cyano-2 ethoxy, cyano-3 propoxy or cyano-4 butoxy group,

a benzyloxy group of formula ##STR17## in which R₁₅ has one of the following values: 3--Cl, 4--Cl, 3--F, 4--F, 3--NO₂, 3--CN, 3--CF₃, or

a disubstituted benzyloxy group of formula: ##STR18## or an ether group of formula --CH₂ --O--R₁₆ in which R₁₆ is a linear or branched alkyl group having from 1 to 3 carbon atoms, and R in para position is selected from the group consisting of:

methyl-3 n-butyloxy, cyclopentylmethoxy, cyclohexylmethoxy or cyano-4 butoxy group),

a benzyloxy group of formula ##STR19## in which R₁₇ is a cyano or nitro group,

the cyano-3 nitro-5 benzyloxy group, or

the pyridinyl-3 methoxy group,

or an ester group of formula --CH₂ --OCOR₁₈ in which R₁₈ is a methyl or ethyl group and R in para position is the cyclohexylmethoxy group or a benzyloxy group of formula ##STR20## in which R₁₇ is a cyano or nitro group.

(A) The process for preparing the compounds of formula (I) in which the parameters (X,A,R₁,R₂) represent (O,O,H, CH₂ OCOR₃), R₃ having the same meanings as above, consists in condensing the compounds of formula: ##STR21## in which R₁₉ represents one of the following groups: n-butyloxy; methyl-3 butoxy; cyclopentylmethoxy; cyclohexylmethoxy; cyano-2 ethoxy; cyanomethoxy; benzyloxy of formula ##STR22## with R₄ =H, 3--Cl, 3--F, 4--F, 3--CN or 3--NO₂ ; and benzyloxy of formula ##STR23## with R₅ =Cl or CN, with the acid chlorides of formula:

    R.sub.3 COCl                                               (III)

in which R₃ has the same meanings as above.

This condensation is carried out preferably at room temperature, either in an organic solvent such as chloroform or tetrahydrofuran in the presence of triethylamine, or in pyridine.

The compounds of formula (II), except those in which R₁₉ is the cyano-2 ethoxy group, are prepared according to the method described in Belgian Patent No. 851 893 (reacting the p-hydroxyphenyl-3 hydroxymethyl-5 oxazolidinone-2 on the suitable chloride, bromide or tosylate).

The compound of formula (II) in which R₁₉ is the cyano-2 ethoxy group is obtained by cyclising, by action of ethyl carbonate, the compound of formula ##STR24## to obtain the compound of formula: ##STR25## which is selectively hydrogenolysed in the presence of palladium on charcoal, in ethanol, preferably at room temperature, to give the compound of formula: ##STR26## which is condensed with acrylonitrile in the presence of triton B, to give the compound of formula: ##STR27## which is then hydrogenolysed in ethanol in the presence of palladium on charcoal, and preferably, of some drops of hydrochloric ethanol.

The compound of formula (IV) is obtained in condensing, in methanol or ethanol, the parabenzyloxyaniline with the benzyloxy-3 epoxy-1,2 propane.

(B) The process for preparing the compounds of formula (I) in which the parameters (X,A,R₁) represent (O,O,H), and R₂ is an ether group of formula --CH₂ --OR₆ in which R₆ has the same meanings as above consists:

(1) either in submitting the compounds of formula: ##STR28## in which R₂₀ represents the meta-methyl group or one of the following groups in para position: linear or branched alkyloxy having from 4 to 6 carbon atoms; cycloalkylmethoxy the alkyl moiety of which has from 4 to 7 carbon atoms; (methyl-1 cyclopentyl-1) methoxy; butene-2 oxy; methyl-3 butene-2 oxy; (cyclopentene-1 yl) methoxy; (cyclohexene-1 yl) methoxy; morpholino-2 ethoxy; chloro-4 butyloxy; (oxo-4 cyclohexyl-1) methoxy; oxo-2 propoxy; cyano-3 propoxy; cyano-2 ethoxy; cyano-4 butoxy: dimethyl amino; (tetrahydropyranyl-4) methoxy; (tetrahydropyranyl-3) methoxy; benzyloxy of formula ##STR29## in which R₇ =H, 3--Cl, 4--Cl, 3--F, 4--F, 3--I, 3--Br, 3--CF₃, 3--NO₂, 4--NO₂, 3--CN, 4--CN; disubstituted benzyloxy of formula: ##STR30## in which R₈, R₉ and R₅ have the same meanings as above; and ##STR31## to a so-called "phase transfer" reaction, in the presence of a catalyst so-called "phase transfer catalyst", and in a basic medium with derivatives of formulae:

    (CH.sub.3).sub.2 SO.sub.4

    R.sub.6 --Cl or

    R.sub.6 --I

in which R₆ has the same meanings as previously.

The used catalyst is preferably the benzyltributylammonium bromide, but it can be chosen among the catalysts mentioned in the following documents:

Synthesis 1973, 441, and Angewandte Chemie, Edit. Int. Vol. 13, 170, (1974).

The used base is preferably aqueous soda and the reaction can be carried out in an organic solvent such as methylene chloride or benzene.

The compounds of formula (IIa), except those in which R₂₀ represents the cyano-2 ethoxy group which is obtained by hydrogenolysing the compound of formula (VII), are prepared according to the method described in Belgian Patent No. 851 893.

(2) or in condensing the compounds of formula: ##STR32## in which R'₆ is a linear or branched alkyl group having from 1 to 5 carbon atoms, a cyclohexyl or a methoxymethyl group, with the chlorides or tosylates of formula:

    R'.sub.20 --Cl

    R'.sub.20 --OTs

in which R'₂₀ has the same meanings as R₂₀ except for the metha-methyl and paracyano-2 ethoxy groups.

The condensation is carried out with reflux in acetone or acetonitrile in the presence of potassium carbonate, or with reflux in dimethylformamide in the presence of sodium hydride.

The compounds of formula (VIII) are obtained by hydrogenolysing in the presence of palladium on charcoal, the compounds of formula: ##STR33## in which R'₆ has the same meanings as in formula (VIII).

The compounds of formula (IX) are obtained by a three stage synthesis which consists in condensing the chlorhydrine of formula: ##STR34## in which R'₆ has the same meanings as in formula (IX) with phosgene, then in condensing the product thus obtained with parabenzyloxyaniline and at last in cyclising the obtained product by means of ethanolic potash or sodium methylate in methanolic solution.

(3) or, when R is the cyano-2 ethoxy group, in reacting acrylonitrile in the presence of triton B with the compound of formula (VIII);

(4) or, according to the process described above for the synthesis of compounds of formula (IX), but with chlorohydrines of formula (X) and anilines of formula: ##STR35## in which R₂₁ represents a trans styryl group of formula ##STR36## with R₁₀ =H, Cl, CN, NO₂ ; a cis styryl group of formula ##STR37## with R₁₁ =H, NO₂ ; a stylbene group ##STR38## a phenethyl group; or a phenyl group; instead of the parabenzyloxyaniline; (5) or, when (I) is (Ia) in submitting to a "phase transfer" reaction the compound of absolute configuration R(-) and having the formula: ##STR39## in presence of a phase transfer catalyst, of (CH₃)₂ SO₄ and in a basic medium.

The compound of formula (IIb) is obtained by reacting the metacyanobenzyl chloride with the compound of formula: ##STR40## which is obtained by hydrogenolysing in the presence of palladium on charcoal, the compound of absolute configuration R(-) and having the formula: ##STR41##

This last compound is obtained according to the method described for the synthesis of compounds of formula (IX) but from parabenzyloxyaniline and benzyloxy-3 paratosyloxy-1 propanol-2 having the S(+) configuration, instead of the compound of formula (X).

(6) or, when (I) is (Ib), according to the process described for the synthesis of the compounds of formula (IX), but by using p-(cyano-3) benzyloxyaniline instead of parabenzyloxyaniline and methoxy-3 paratosyloxy-1 propanol-2 of absolute configuration R and of formula: ##STR42## instead of the compound of formula (X).

The compound of formula (XII) is obtained by reacting the tosyl chloride, in a benzene medium and in the presence of pyridine, with the methoxy-3 propane diol-1,2 of absolute configuration S and of formula: ##STR43##

This compound of formula (XIII) is obtained by catalytically debenzylating, in the presence of palladium on charcoal, the compound of absolute configuration R and of formula: ##STR44##

The compound of formula (XIV) is obtained by opening, with methanol in the presence of boron trifluoride etherate, benzyloxy-1 epoxy-2,3 propane having the absolute configuration S(+) and described in J. Chem. Soc. 1967 1021.

(C) The process for preparing the compounds of formula (I) in which the parameters (X,A,R₁) represent (O,O,H), R₂ represents an amine group of formula ##STR45## in which ##STR46## has the same meanings as above, consists in reacting amines of formula ##STR47## with the compounds of formula: ##STR48## in which R₂₂ is a n-butyloxy, methyl-3 butyloxy, cyclopentylmethoxy, cyclohexylmethoxy, cyanomethoxy, cyanoethoxy group, benzyloxy group of formula ##STR49## in which R₁₄ has the same meaning as above or a chloro-3 nitro-5 benzyloxy group.

The compounds of formula (XV) are obtained by action of mesyl chloride on the compounds of formula: ##STR50## in which R₂₂ has the same meanings as in formula (XV), the compounds of formula (IId) being obtained according to the process described in Belgian Patent No. 851 893.

(D) The process for preparing the compounds of formula (I) in which the parameters (X, A, R₁) represent (O,CH₂,H), R₂ represents the hydroxymethyl group and R represents the para(metanitro) benzyloxy group consists in reacting metanitrobenzyl chloride on the compound of formula: ##STR51## obtained by hydrogenolysing in the presence of palladium on charcoal, the compound of formula: ##STR52## obtained by reducing with lithium borohydride the compound of formula: ##STR53##

The compound of formula (XVIII) is obtained by esterifying with ethanol in the presence of sulfuric acid, the compound of formula: ##STR54## which is obtained by condensing parabenzyloxyaniline with itaconic acid.

The process for preparing the compound of formula (I) in which (X,A,R₁) is (H₂, CH₂,H), R₂ is the hydroxymethyl group and R is the parabenzyloxy group consists in reducing with lithium aluminium hydride the compound of formula (XVIII).

(E) The process for preparing the compound of formula (I) in which (X, A,R₁) is (O,S,H), R₂ is the methoxymethyl group and R is the para(metanitro) benzyloxy group consists in cyclising with phosgene the compound of formula: ##STR55## obtained by condensing para(metanitro)benzyloxyaniline with methoxy methyl-2 thiooxirane.

(F) The process for preparing the compounds of formula (I) in which the parameters (X,A,R₁) are (S,O,H), R₂ is a hydroxymethyl group or a --CH₂ OR₁₆ group in which R₁₆ has the same meanings as above, consists in cyclising with thiophosgene,

either compounds of formula: ##STR56## in which R₂₃ represents a linear or branched alkyloxy group having from 2 to 5 carbon atoms, cyclopentylmethoxy, cyclohexylmethoxy, (cyclohexene-1 yl) methoxy, (tetrahydropyrannyl-4)methoxy, cyanomethoxy, cyano-2 ethoxy, cyano-3 propoxy, cyano-4 butoxy group, benzyloxy group of formula ##STR57## with R₁₅ =3--Cl, 4--Cl, 3--F, 4--F, 3--NO₂, 3--CN or 3--CF₃, (chloro-3 cyano-5) benzyloxy or (cyano-3 fluoro-4) benzyloxy group,

or compounds of formula: ##STR58## in which R₁₆ has the same meanings as above and R₂₄ represents a methyl-3 butoxy; cyclopentylmethoxy, cyclohexylmethoxy, cyano-4 butoxy group, a benzyloxy group of formula ##STR59## with R₁₇ =CN or NO₂, a (cyano-3 nitro-5) benzyloxy or (pyridinyl-3) methoxy group.

The compounds of formula (XXI) are obtained by condensing glycidol and anilines of formula: ##STR60## in which R₂₃ has the same meanings as in formula (XXI), and the compounds of formula (XXII) are obtained by condensing anilines of formula: ##STR61## in which R₂₄ has the same meanings as in formula (XXII) with the chlorohydrines of formula: ##STR62## in which R₁₆ has the same meaning as above.

(G) The process for preparing the compounds of formula (I) in which the parameters (X,A,R₁) represent (S,O,H) and R₂ is an ester group of formula R₁₈ COO CH₂ in which R₁₈ has the same meaning as above, consists in condensing the acid chloride of formula:

    R.sub.18 COCl                                              (IIIa)

in which R₁₈ is as above, with the compounds of formula (I) having the following structure: ##STR63## in which R₂₅ represents a cyclohexylmethoxy group or a benzyloxy group of formula ##STR64## with R₁₇ =CN or NO₂, according to the process described under chapter (A) above. The compounds (Ic) are obtained according to the process described under chapter (F) above.

The following preparations are given by way of example to illustrate the invention.

EXAMPLE I Para (meta-nitrobenzyloxy) phenyl-3 acetoxy-methyl-5 oxazolidinone-2 [I] Code number: 36

A solution of 10.5 g of para(metanitrobenzyloxy)phenyl-3 hydroxy methyl-5 oxazolidinone-2 [(II), mp=135° C.], 2.5 cm³ of acetyl chloride and 4.5 cm³ of triethylamine in 100 cm³ of chloroform was left for 12 hours at room temperature. Then, the solution was diluted in water, the chloroformic phase was decanted, the solvent was evaporated and the residue was recrystallized in pure alcohol. 8 g of product were obtained.

Yield: 72%

Melting point: 126° C.

Empirical formula: C₁₉ H₁₈ N₂ O₇

Molecular weight: 386.35

Elementary Analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             59.06        4.70   7.25                                           Found (%)   59.10        4.56   6.95                                           ______________________________________                                    

With the same method, but from the corresponding reagents, the compounds of formula (I) were prepared, given in table I and bearing code numbers: 1 to 44; 103 to 108; 115, 117, 120 to 141; 178 and 208.

EXAMPLE 2 (paracyano-2 ethoxyphenyl)-3 hydroxymethyl-5 oxazolidinone-2 [II] ##STR65## First step: (p-benzyloxyphenyl)-3 benzyloxymethyl-5 oxazolidinone-2 [V]

This compound was obtained following a method in which a mixture of 0.2 mole of the compound of formula: ##STR66## 200 ml of ethyl carbonate and 8 ml of triethylamine is heated at 100°-110° C. for 5 hours, then the product was filtered and recrystallized in pure alcohol.

Yield: 80%

Melting point: 126° C.

Empirical formula: C₂₄ H₂₃ NO₄

Molecular weight: 389.43

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             74.02        5.95   3.60                                           Found (%)   73.87        6.14   3.89                                           ______________________________________                                    

Second step: (p-hydroxyphenyl)-3 benzyloxymethyl-5 oxazolidinone-2 [VI]

A suspension of 18 g (0.046 mole) of the compound obtained in the first step and 2 g of 10% palladium charcoal in 400 ml of pure alcohol was hydrogenolysed in autoclave, at room temperature and under a hydrogen pressure of 4-5 kg. Then the mixture was filtered, the solvent evaporated and the residue recrystallized in pure alcohol.

Yield: 73%

Melting point: 153° C.

Empirical formula: C₁₇ H₁₇ NO₄

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             68.21        5.73   4.68                                           Found (%)   68.38        5.62   4.46                                           ______________________________________                                    

By the same process, but from the corresponding reagents, the compound of formula (IIc) [mp=188° C., Empirical formula: C₁₀ H₁₁ NO₄ ] (from compound of formula (Va)); and the compound of formula (XVI) [mp=196° C., empirical formula: C₁₁ H₁₃ NO₃ ] (from compound of formula (XVIII)) were obtained.

Third step: (p-cyanoethoxy-2 phenyl)-3 benzyloxymethyl-5 oxazolidinone-2 [VII]

A solution of 13 g (0.03 mole) of the compound prepared in the second step, in 45 g (0.86 mole) of acrylonitrile in the presence of 1 ml of triton B (40% in methanol), was brought to reflux for 15 hours. Then the acrylonitrile in excess was evaporated, the residue was taken up in 100 ml of N soda and filtered, the precipitate was washed with water then with ether and recrystallized in methanol.

Yield: 60%

Melting point: 112° C.

Empirical formula: C₂₀ H₂₀ N₂ O₄

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             68.17        5.72   7.95                                           Found (%)   67.89        5.66   8.21                                           ______________________________________                                    

By the same method, but from the corresponding reagents, the compounds of formula (I) were prepared, given in table (I) and bearing code numbers 52 to 54 and 145 to 147.

Fourth step: (p-cyano-2 ethoxyphenyl)-3 hydroxymethyl-5 oxazolidinone-2 (II) (R₁₉ =O CN)

A suspension of 3.5 g (0.01 mole) of (p-cyano-2 ethoxyphenyl)-3 benzyloxymethyl-5 oxazolidinone-2, obtained in the preceding step, 0.4 g of 10% palladium charcoal and 0.05 ml of 7.5 N chlorhydric ethanol in 250 ml of dioxane, was hydrogenolysed in an autoclave, at a pressure of 1 kg of hydrogen and at room temperature. The mixture was filtered, the residue was purified by chromatography on a silica column. Eluted with the mixture chloroform-acetone 50/50, the product was obtained which was recrystallized in pure alcohol.

Weight: 1 g.

Yield: 39%

Melting point: 131° C.

Empirical formula: C₁₃ H₁₄ N₂ O₄

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             59.53        5.38   10.68                                          Found (%)   59.06        5.24   10.37                                          ______________________________________                                    

EXAMPLE 3 para (meta-nitrobenzyloxy) phenyl-3 methoxymethyl-5 oxazolidinone-2 (I) Code number: 61

A mixture of 10.3 g of para (metanitrobenzyloxy) phenyl-3 hydroxymethyl-5 oxazolidinone (IIa), 10.7 g of benzyltributylammonium bromide, 14.2 g of methyl iodide and 1.8 g of NaOH in 200 ml of water and 280 ml of methylene chloride, was brought to reflux for 50 hours. Then the mixture was decanted, the organic layer washed with water, the solvent evaporated, the residue taken up in ethyl acetate, the filtrate was filtered and chromatographed on a silica column; eluted with chloroform. 6.9 g of the product was obtained which was recrystallized in isopropanol.

Yield: 62%

Melting point: 78° C.

Empirical formula: C₁₈ H₁₈ N₂ O₆

Molecular weight: 358.34

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             60.33        5.06   7.82                                           Found (%)   60.52        5.10   7.92                                           ______________________________________                                    

By the same method, but from the corresponding reagents, the compounds of formula (I) were prepared, given in table (I) and bearing code numbers 45, 46, 55 to 57; 59, 64 to 73; 109 to 112; 142 to 156; 159 to 169; 179 to 186; 188, 197, 198 and 199 (Ia)

EXAMPLE 4 para-n-butyloxy phenyl-3 isopropyloxymethyl-5 oxazolidinone-2 (I) Code number: 47 First step: para benzyloxyphenyl-3 isopropyl oxymethyl-5 oxazolidinone-2 (IX) Code number: 225

To a solution of 59 g of phosgene in 560 ml of dichloroethane was added 83.4 g of chloro-1 isopropyloxy-3 propanol-2 (X), then in 30 minutes a solution of 81.9 g of N,N-diethylaniline in 160 ml of dichloroethane. The mixture was heated to 50° C. for 2 hours, 250 ml of water was added, the organic layer was decanted and added in 30 minutes on 217.5 g of para benzyloxyaniline. The mixture was brought to reflux for 3 hours, filtered, washed with a 1 N hydrochloric acid solution, with water, dried, the solvent was evaporated and the residue was recrystallized in ethanol. 165.5 g of the product were obtained.

Yield: 81%

Melting point: 107° C.

NMR spectrum: δ ppm (DMSO) 9.80,s,--NH--COO--: 1 proton; 7.40,s, and 5.08,s: 7 protons; 7.18,m,aromatic protons: 4 protons; 5.20,m, ##STR67## 1 proton; 3.85,d, (J=5 Hz) --CH₂ --O--: 2 protons; 3.59,m, Cl--CH₂ --CH--: 3 protons; 1.06,d, (J=7 Hz) ##STR68## 6 protons.

IR spectrum: band NH--COO at 1700 and 3305 cm⁻¹

A solution of 165.5 g of this compound and 29.3 g of potash in 2.4 liters of ethanol was brought to 50° C. for 3 hours. Then the solvent was evaporated, the residue was taken up in chloroform, washed with water, dried and the solvent was evaporated. The residue was crystallized in ether and recrystallized in dioxane. 113 g of product were obtained.

Yield: 75%

Melting point: 110° C.

Empirical formula: C₂₀ H₂₃ NO₄

Molecular weight: 341.4

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             70.36        6.79   4.10                                           Found (%)   70.14        6.49   4.22                                           ______________________________________                                    

By the same method, but from the corresponding reagents, the compounds of formula (IX) were prepared, given in table (II) and bearing code numbers 226 to 229; as well as:

the compounds of formula (I) given in table I and bearing code numbers 187, 189 to 196,

the compound of formula (Ib) given in table I and bearing code number 20, and

the compound of formula (Va):

mp=100° C.;

Yield: 93%;

Empirical formula: C₂₄ H₂₃ NO₄ ; [α]_(D) ²¹ =-33° 5 (C=1, CH₂ Cl₂).

Second step: parahydroxyphenyl-3 isopropyloxymethyl-5 oxazolidinone-2 (VIII) Code number: 221

85 g of the compound prepared in the first step in 1700 ml of dioxane and 15 ml of 6.5 N hydrochloric alcohol, in the presence of 8.5 g of 10% palladium charcoal, were hydrogenolysed in an autoclave at a pressure of 6 kg for 6 hours. Then the mixture was filtered, the solvent was evaporated, the residue was crystallized in ether and recrystallized in toluene. 43.7 g of product were obtained.

Yield: 70%

Melting point: 93° C.

Empirical formula: C₁₃ H₁₇ NO₄

Molecular weight: 251.3

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             62.14        6.82   5.57                                           Found (%)   62.14        6.80   5.56                                           ______________________________________                                    

By the same method, but from the corresponding reagents, the compounds of formula (VIII) were prepared, given in table III and bearing code numbers: 222 to 224 and 230 to 232.

Third step: para n-butyloxyphenyl-3 isopropyloxy methyl-5 oxazolidinone-2 (I) Code number: 47

To a solution of 8.7 g of the compound obtained in the preceding step in 150 ml of dimethyl formamide, was added 1.68 g of sodium hydride (50%), then 9.7 g of n-butyl chloride. The mixture was brought to 100° C. for 2 hours and 30 mn, then the solvent was evaporated, the residue was taken up in chloroform, washed with water, dried, the solvent was evaporated, the residue was crystallized in isopropyl ether and recrystallized in isopropanol. 7.8 g of product were obtained.

Yield: 73%

Melting point: 77° C.

Empirical formula: C₁₇ H₂₅ NO₄

Molecular weight: 307.4

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             66.42        8.20   4.56                                           Found (%)   66.19        8.27   4.36                                           ______________________________________                                    

By the same method, but from the corresponding reagents, the compounds of formula (I) were prepared, given in table I and bearing the following code numbers: 48, 50, 51, 58, 60, 62, 63, 142, 143, 152, 153, 157, 158, 160, 99 and 234, as well as the compound of formula (IIb):

mp=132° C.; Yield: 97%; [α]_(D) ²⁰ =-79° 2 (C=1, pyridine:

Empirical formula: C₁₈ H₁₆ N₂ O₄ ; Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             66.66        4.97   8.64                                           Found (%)   66.54        5.01   8.54                                           ______________________________________                                    

EXAMPLE 5 p-toluene sulfonyloxy-1 hydroxy-2 methoxy-3 propane (R configuration) (XII) First step: methoxy-1 hydroxy-2 benzyloxy-3 propane R (+) (XIV)

To a solution of 4.14 g of benzyloxy-3 epoxy-1,2 propane in 40 ml of methanol, cooled to 5° C., were added 3 drops of boron trifluoride etherate. Then the mixture is left so as to reach slowly the room temperature (3 hours). A few gms. sodium bicarbonate was added, the solvent was evaporated, the residue was taken up in 200 ml of water, extracted with methylene chloride, dried on sodium sulfate and the solvent was evaporated. The residue was chromatographed by high performance liquid chromatography (HPLC) (SiO₂ 15-25μ), the elution agent being a mixture of ethyl acetate (60%) and n-heptane (40%), and distillated BP₀.1 =175° C. 70% of product were obtained.

[α]_(D) ²⁰ =+44° 3 (C=5, ethanol).

Empirical formula: C₁₁ H₁₆ O₃

Second step: methoxy-3 propane diol-1,2 (S) (XIII)

A solution of 4.44 g of the compound obtained in the first step, in 200 ml of ethanol and 1 drop of hydrochloric ethanol, was hydrogenolised at a pressure of 5 kg and a temperature of 30° C., in the presence of 10% palladium charcoal. Then the mixture was filtered, a few gms. bicarbonate was added to the filtrate, the solvent was evaporated, the residue was taken up in ether, washed with water, dried on sodium sulfate, and the solvent was evaporated. 2.37 g of product were obtained after HPCL (SiO₂) of the crude product, the elution agent being a mixture of ethylacetate (60%) and n-heptane (40%).

Third step: toluene sulfonyloxy-1 hydroxy-2 methoxy-3 propane (R) (XII)

To a solution of 2.37 g of the compound obtained at the preceding step, in 10 ml of pyridine, cooled at 0° C., was slowly added a solution of 4.27 g of tosyl chloride in 50 ml of benzene. Then the mixture was left for 40 hours at room temperature, diluted with ether, filtered and the filtrate was washed with 1 N hydrochloric acid, then with water and with an aqueous solution of sodium bicarbonate until neutrality. Then it was dried on sodium sulfate and the solvent was evaporated. The residue was chromatographed by HPLC (elution agent: ethyl acetate: 60%; n-heptane 40%). Yield: 53%. The product obtained was directly used in the synthesis of the compound of formula (Ib) according to the method described in the first step of example 4.

EXAMPLE 6 para benzyloxyphenyl-3 N-methylaminomethyl-5 oxazolidinone-2 (I) Code number: 81 First step: mesylate of parabenzyloxyphenyl-3 hydroxymethyl-5 oxazolidinone-2 (XV)

To a solution of 28.5 g of para benzyloxyphenyl-3 hydroxymethyl-5 oxazolidinone-2 (IId) in 27 ml of triethylamine and 750 ml of methylene chloride cooled to 5° C., were added 15 ml of mesyl chloride. They were left for 15 minutes in contact, then the solution was concentrated, diluted with water and the precipitate was filtered and recrystallized in acetone. 32 g of product were obtained.

Yield: 90%

Melting point: 163° C.

Empirical formula: C₁₈ H₁₉ NO₆ S

Molecular weight: 377.41

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             57.28        5.07   3.71                                           Found (%)   57.30        4.95   3.46                                           ______________________________________                                    

Second step: para benzyloxyphenyl-3 N-methylaminomethyl-5 oxazolidinone-2 [I]

A mixture of 29 g of the compound obtained at the preceding step and 50 g of ammonia in 500 ml of methanol, was heated to 110° C. for 6 hours in an autoclave. Then the solvent was evaporated, the residue was taken up in chloroform, washed with water, the solvent was evaporated and the residue was recrystallized in isopropanol. 17 g of product were isolated.

Yield: 74%

Melting point: 124° C.

Empirical formula: C₁₇ H₁₈ N₂ O₃

Molecular weight: 298.33

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             68.44        6.08   9.39                                           Found (%)   68.25        6.19   8.82                                           ______________________________________                                    

By the same method, but from the corresponding reagents, the compounds of formula (I) were prepared, given in table I and bearing the code numbers: 74 to 86; 170 to 176 and 201 to 207.

EXAMPLE 7 N-parabenzyloxyphenyl-1 hydroxymethyl-4 pyrrolidinone-2 (XVII) First step: [(N-parabenzyloxyphenyl pyrrolidinone-2) yl-4] carboxylic acid (XIX)

A mixture of 46 g of itaconic acid and 70 g of parabenzyloxyaniline in 400 ml of water was brought to reflux, then washed on the filter with chloroform, dried and recrystallized in acetone. 77 g of product were obtained.

Yield: 71%

Melting point: 194° C.

Empirical formula: C₁₈ H₁₇ NO₄

Molecular weight: 311.32

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             69.44        5.50   4.50                                           Found (%)   69.69        5.48   4.80                                           ______________________________________                                    

Second step: [(N-parabenzyloxyphenyl pyrrolidinone-2) yl-4] ethyl carboxylate (XVIII)

A solution of 84 g of the acid obtained in the first step in 400 ml of ethanol and 6 ml of concentrated sulfuric acid was brought to reflux for 2 hours. Then, it was cooled, the precipitate was filtered, washed with water, dried and recrystallized in isopropanol. 47 g of product were obtained.

Yield: 51%

Melting point: 106° C.

Empirical formula: C₂₀ H₂₁ NO₄

Molecular weight: 339.38

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             70.78        6.24   4.13                                           Found (%)   70.96        6.39   4.44                                           ______________________________________                                    

Third step: N-para benzyloxyphenyl-1 hydroxymethyl-4 pyrrolidinone-2 (XVII)

To a mixture of 7.9 g of sodium borohydride and 18 g of lithium bromide in 400 ml of diglyme, were added 70 g of the compound prepared at the preceding step. Then the mixture was brought to 100° C. in 50 mn, diluted in 500 g of ice and 50 ml of concentrated hydrochloric acid, extracted with chloroform; the solvent was evaporated, the residue was crystallized in isopropyl ether and recrystallized in toluene. 45 g of product were obtained.

Yield: 72%

Melting point: 110° C.

Empirical formula: C₁₈ H₁₉ NO₃

Molecular weight: 297.34

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             72.70        6.44   4.71                                           Found (%)   72.44        6.36   4.68                                           ______________________________________                                    

EXAMPLE 8 N-parabenzyloxyphenyl hydroxymethyl-3 pyrrolidine (I) Code number: 220

A solution of 53 g of the compound of formula (XVIII) obtained in example 7, in 300 ml of anhydrous tetrahydrofuran, was added while cooling to 11.8 g of lithium aluminium hydride (pellets) in 1000 ml of tetrahydrofuran. Then it was brought to reflux for 2 hours, then 6.3 ml of water, 4.75 ml of 20% NaOH and 22 ml of water were successively added. It was filtered, the filtrate was evaporated and the residue was crystallized in ethyl acetate. 38 g of product were obtained.

Yield: 85%

Melting point: 87° C.

Empirical formula: C₁₈ H₂₁ NO₂

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             76.29        7.47   4.94                                           Found (%)   76.40        7.60   4.65                                           ______________________________________                                    

EXAMPLE 9 para (metanitro) benzyloxyphenyl-3 methoxymethyl-5 thiazolidinone-2(I) Code number: 219 First step: para (metanitro) benzyloxyanilino-3 methoxy-1 propane thiol-2, oxalate (XX)

To a solution of 48.8 g of para (metanitro) benzyloxyaniline in 700 ml of isopropanol were slowly added 20.8 g of methoxymethyl-2 thiooxirane, and the mixture was brought to reflux for 7 hours. Then the solvent was evaporated, and the residue was chromatographed on a silica column. By eluting with methylene chloride, 38.4 g of an oil were obtained which were dissolved in acetonitrile. A solution of oxalic acid was added to acetonitrile, and the precipitate was filtered.

Yield: 43%

Melting point: 120° C.

Empirical formula: C₁₉ H₂₂ N₂ O₈ S

Molecular weight: 438.45

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             52.04        5.06   6.39                                           Found (%)   51.79        4.88   6.48                                           ______________________________________                                    

Second step: para (metanitro) benzyloxyphenyl)-3 methoxymethyl-5 thiazolidinone-2 (I) Code number: 219

To a solution of 3 g of phosgene in 90 ml of dichloroethane, cooled to -10° C., was added 4.14 g of potassium carbonate then 6 g of the compound of formula (XX) (base form) obtained in the previous step, dissolved in 50 ml of dichlorethane, while maintaining the temperature between 5° and 10° C. Then, it came slowly to room temperature (3 hours), water was added, the organic phase was decanted, dried on sodium sulfate and the solvent was evaporated. The residue was crystallized in isopropyl ether, and recrystallized in isopropyl alcohol. 3 g of product were obtained.

Yield: 47%

Melting point: 74° C.

Empirical formula: C₁₈ H₁₈ N₂ O₅ S

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             57.74        4.85   7.48                                           Found (%)   57.45        4.97   7.18                                           ______________________________________                                    

EXAMPLE 10 para ethoxyphenyl-3 hydroxymethyl-5 oxazolidine thione-2 (I) Code number: 87

To a solution of 9.6 g of paraethoxyanilino-3 propanediol-1,2 (XXI) and 20.5 ml of triethylamine in 100 ml of tetrahydrofuran, were slowly added 5.2 g of thiophosgene while maintaining the temperature to 20° C. Then after 4 hours it was filtered, the filtrate was evaporated and the residue chromatographed on a silica column. Eluted with chloroform, 5.3 g of product were obtained.

Yield: 46%

Melting point: 133° C.

Empirical formula: C₁₂ H₁₅ NO₃ S

Molecular weight: 253.31

Elementary analysis:

    ______________________________________                                                   C          H      N                                                  ______________________________________                                         Calculated (%)                                                                             56.89        5.97   5.53                                           Found (%)   56.98        6.14   5.54                                           ______________________________________                                    

By the same method, but from the corresponding reagents, the compounds of formula (I) were prepared, given in table I and bearing code numbers: 88 to 98; 100, 101, 102, 113 to 120; 177 and 208 to 218.

    TABLE I           Melting   Code  Empirical Molecular point Yield ELEMENTARY ANALYSIS N      umber X A R.sub.1 R.sub.2 R formula weight (°C.) (%) % C H      N       ##STR69##        1 Oxygen Oxygen H CH.sub.2 OCOCH.sub.3 4-OCH.sub.2CN C.sub.14 H.sub.14      N.sub.2 O.sub.5 290.27 92 72 Cal. 57.93 4.86 9.65           Obt. 57.90      4.87 9.42 2 " " " CH.sub.2 OCOEt " C.sub.15 H.sub.16 N.sub.2 O.sub.5      304.29 66 81 Cal. 59.20 5.30 9.21           Obt. 59.11 5.37 9.06  3 " "      " CH.sub.2       OCOCH.sub.3      ##STR70##       " " 68 75 Cal.Obt. 59.2059.03 5.305.25 9.219.35  4 " " " CH.sub.2 OCOEt      " C.sub.16 H.sub.18 N.sub.2 O.sub.5 318.32 66 80 Cal. 60.37 5.70 8.80             Obt. 60.44 5.54 8.64       5 " " "      ##STR71##       " C.sub.17 H.sub.20 N.sub.2 O.sub.5 332.34 72 58 Cal.Obt. 61.4361.14      6.076.23 8.438.37  6 " " " CH.sub.2 OCOC.sub.4 H.sub.9n " C.sub.18      H.sub.22 N.sub.2 O.sub.5 346.37 65 72 Cal. 62.41 6.40 8.09      Obt. 62.70 6.59 7.94       7 " " "      ##STR72##       " C.sub.18 H.sub.22 N.sub.2 O.sub. 5 346.37 90 57 Cal.Obt. 62.4162.29      6.406.21 8.097.90       8 " " "      ##STR73##       " C.sub.20 H.sub.24 N.sub.2 O.sub.5 372.41 104  76 Cal.Obt. 64.5064.35      6.506.30 7.527.69  9 " " " CH.sub.2 OCOC.sub.8 H.sub.17n " C.sub.22      H.sub.30 N.sub.2 O.sub.5 402.48 75 75 Cal. 65.65 7.51 6.96      Obt. 65.41 7.35 6.72       10 " " "      ##STR74##       " C.sub.20 H.sub.18 N.sub.2 O.sub.5 366.36 150  68 Cal.Obt. 65.5665.27      4.954.82 7.657.55  11 " " " CH.sub.2 OCOCH.sub.3 4OC.sub.4 H.sub.9n      C.sub.16 H.sub.21 NO.sub.5 307.34 60 92 Cal. 62.52 6.89 4.56      Obt. 62.49 6.90 4.55        12 " " "      ##STR75##       " C.sub.19 H.sub.27 NO.sub.5 349.41 82 30 Cal.Obt. 65.3165.04 7.797.72      4.013.81  13 " " " CH.sub.2       OCOCH.sub.3      ##STR76##       C.sub.18 H.sub.23 NO.sub.5 333.37 94 85 Cal.Obt. 64.8564.91 6.957.24      4.204.05  14 " " " CH.sub.2 OCOEt " C.sub.19 H.sub.25 NO.sub.5 347.39 90      82 Cal.65.69 7.254.03 Obt. 65.76 7.20 4.35       15 " " "      ##STR77##       " C.sub.20 H.sub.27 NO.sub.5 361.42 78 54 Cal.Obt. 66.4666.21 7.537.51      3.883.66  16 " " " CH.sub.2 OCOC.sub.4 H.sub.9n " C.sub.21 H.sub.29      NO.sub.5 375.45 82 72 Cal. 67.18 7.79 3.73           Obt. 67.24 8.08      3.58       17 " " "      ##STR78##       " C.sub.21 H.sub.29 NO.sub.5 375.45 94 66 Cal.Obt. 67.1867.19 7.797.92      3.733.54       18 " " "      ##STR79##       " C.sub.23 H.sub.31 NO.sub.5 401.49 100  71 Cal.Obt. 68.8068.51      7.787.94 3.493.19  19 " " " CH.sub.2 OCOC.sub.8 H.sub.17n " C.sub.25      H.sub.37 NO.sub.5 431.55 78 62 Cal. 69.57 8.64 3.25           Obt. 69.76      8.91 3.10       20 " " "      ##STR80##       " C.sub.23 H.sub.25 NO.sub.5 395.44 112  65 Cal.Obt. 69.8569.96      6.376.64 3.543.66       21 " " " CH.sub.2 OCOCH.sub.3      ##STR81##       C.sub.19 H.sub.25 NO.sub.5 347.39 102  72 Cal.Obt. 65.6965.96 7.257.55      4.033.98  22 " " " CH.sub.2 OCOEt " C.sub.20 H.sub.27 NO.sub.5 361.42 80      80 Cal. 66.46 7.53 3.88           Obt. 66.68 7.52 4.13  23 " " "      CH.sub.2       OCOCH.sub.3      ##STR82##       C.sub.19 H.sub.19 NO.sub.5 341.35 120  76 Cal.Obt. 66.8567.07 5.615.54      4.103.86  24 " " " CH.sub.2 OCOEt " C.sub.20 H.sub.21 NO.sub.5 355.37 96      82 Cal. 67.59 5.96 3.94           Obt. 67.60 6.15 3.92  25 " " "       ##STR83##       " C.sub.21 H.sub.23 NO.sub.5 369.40 114  65 Cal.Obt. 68.2868.31      6.286.40  3.793.73  26 " " " CH.sub.2 OCOC.sub.4 H.sub.9n " C.sub.22      H.sub.25 NO.sub.5 383.43 86 71 Cal. 68.91 6.57 3.65           Obt. 69.02      6.55 3.60       27 " " "      ##STR84##       " C.sub.22 H.sub.25 NO.sub.5 383.43 116  52 Cal.Obt. 68.9169.16      6.576.63 3.653.55  28 " " " CH.sub.2 OCOC.sub.8 H.sub.17n " C.sub.26      H.sub.33 NO.sub.5 439.53 95 60 Cal. 71.04 7.57 3.19           Obt. 70.97      7.52 2.90       29 " " "      ##STR85##       " C.sub.24 H.sub.21 NO.sub.5 403.42 128  69 Cal.Obt. 71.4571.26      5.255.08 3.473.15  30 " " " CH.sub.2       OCOCH.sub.3      ##STR86##       C.sub.19 H.sub.18 ClNO.sub.5 375.79 58 85 Cal.Obt. 60.7260.87 4.834.94      3.733.62  31 " " " CH.sub.2 OCOEt " C.sub.20 H.sub.20 ClNO.sub.5 389.82      82 82 Cal. 61.62 5.17 3.59           Obt. 61.64 5.45 3.59 32 " " "       ##STR87##       " C.sub.21 H.sub.22 ClNO.sub.5 403.85 88 62 Cal.Obt. 62.4562.30      5.495.46 3.473.20  33 " " " CH.sub.2 OCOC.sub.4 H.sub.9n " C.sub.22      H.sub.24 ClNO.sub.5 417.88 95 73 Cal. 63.23 5.79 3.35           Obt.      63.27 5.69 3.17       34 " " "      ##STR88##       "   " " 92 65 Cal.Obt. 63.2363.22 5.795.67 3.353.25  35 " " " CH.sub.2      OCOC.sub.8 H.sub.17n " C.sub.26 H.sub.32 ClNO.sub.5 473.98 74 65 Cal.      65.88 6.81 2.96           Obt. 66.11 7.05 3.22  36 " " " CH.sub.2      OCOCH.sub.3       ##STR89##       C.sub.19 H.sub.18 N.sub.2 O.sub.7 386.35 126  72 Cal.Obt. 59.0659.10      4.704.56 7.256.95  37 " " " CH.sub.2 OCOEt " C.sub.20 H.sub.20 N.sub.2      O.sub.7 400.38 106  75 Cal. 59.99 5.03 7.00           Obt. 59.86 5.03      6.71       38 " " "      ##STR90##       " C.sub.21 H.sub.22 N.sub.2 O.sub.7 414.40 108  58 Cal.Obt. 60.8660.62      5.355.45 6.766.49  39 " " " CH.sub.2 OCOC.sub.4 H.sub.9n " C.sub.22      H.sub.24 N.sub.2 O.sub.7 428.43 102  70 Cal. 61.67 5.65 6.54      Obt. 61.75 5.69 6.39       40 " " "      ##STR91##       " C.sub.22 H.sub.24 N.sub.2 O.sub.7 428.43 118  43 Cal.Obt. 61.6761.41      5.655.88 6.546.35       41 " " "      ##STR92##       " C.sub.24 H.sub.26 N.sub.2 O.sub.7 454.46 150  28 Cal.Obt. 63.4263.54      5.775.83 6.165.89  42 " " " CH.sub.2 OCOC.sub.8 H.sub.17n " C.sub.26      H.sub.32 N.sub.2 O.sub.7 484.53 83 65 Cal. 64.45 6.66 5.78      Obt. 64.18 6.82 5.64       43 " " "      ##STR93##       " C.sub.24 H.sub.20 N.sub.2 O.sub.7 448.42 182  60 Cal. Obt. 64.2864.39 4      .504.39 6.256.17  44 " " " CH.sub.2       OCOEt      ##STR94##       C.sub.20 H.sub.20 FNO.sub.5 373.39 77 70 Cal.Obt. 64.3364.28 5.405.27      3.753.73  45 " " " CH.sub.2 OCH.sub.3 3-CH.sub.3 C.sub.12 H.sub.15      NO.sub.3 221.25 58 71 Cal. 65.14 6.83 6.33           Obt. 65.36 6.66      6.01 46 " " " " 4OC.sub.4 H.sub.9 n C.sub.15 H.sub.21 NO.sub.4 279.33 50      57 Cal. 64.49 7.58 5.01           Obt. 64.40 7.55 4.79  47 " " "       ##STR95##       " C.sub.17 H.sub.25 NO.sub.4 307.38 77 62 Cal.Obt. 66.4266.19 8.208.27      4.564.36       48 " " "      ##STR96##       " C.sub.20 H.sub.29 NO.sub.4 347.44 53 71 Cal.Obt. 69.1369.30 8.418.62      4.033.83  49 " " " CH.sub.2       OCH.sub.3      ##STR97##       C.sub.17 H.sub.23 NO.sub.4 305.36 70 48 Cal.Obt. 66.8666.79 7.597.47      4.594.44       50 " " "      ##STR98##       " C.sub.19 H.sub.27 NO.sub.4 333.41 66 35 Cal.Obt. 68.4468.54 8.168.39      4.204.22       51 " " "      ##STR99##       " C.sub.22 H.sub.31 NO.sub.4 373.47 67 59 Cal.Obt. 70.7570.63 8.378.53      3.753.85  52 " " " CH.sub.2       OCH.sub.3      ##STR100##       C.sub.14 H.sub.16 N.sub.2 O.sub.4 276.28 104  57 Cal.Obt. 60.8660.59      5.845.50 10.1410.11       53 " " "      ##STR101##       " C.sub.16 H.sub.20 N.sub.2 O.sub.4 304.34 89 39 Cal.Obt. 63.1463.29      6.626.73 9.219.36       54 " " "      ##STR102##       " C.sub.19 H.sub.24 N.sub.2 O.sub.4 344.39 80 42 Cal.Obt. 66.2666.19      7.026.88 8.137.98  55 " " " CH.sub.2       OCH.sub.3      ##STR103##       C.sub.18 H.sub.25 NO.sub.4 319.39 90 63 Cal.Obt. 67.6967.96 7.897.83      4.394.39       56 " " " "      ##STR104##       C.sub.18 H.sub.23 NO.sub.4 317.37 80 55 Cal.Obt. 68.1268.21 7.307.61      4.414.39  57 " " " CH.sub.2       OCH.sub.3      ##STR105##       C.sub.18 H.sub. 19 NO.sub.4 313.34 90 83 Cal.Obt. 68.9969.19 6.116.07      4.474.24       58 " " "      ##STR106##       " C.sub.20 H.sub.23 NO.sub.4 341.39 110  75 Cal.Obt. 70.3670.14      6.796.49 4.104.22  59 " " " CH.sub.2       OCH.sub.3      ##STR107##       C.sub.18 H.sub.18 ClNO.sub.4 347.79 96 78 Cal.Obt. 62.1661.99 5.225.11      4.033.88       60 " " "      ##STR108##       " C.sub.20 H.sub.22 ClNO.sub.4 375.84 99 70 Cal.Obt. 63.9163.92      5.905.90 3.733.68  61 " " " CH.sub.2       OCH.sub.3      ##STR109##       C.sub.18 H.sub.18 N.sub.2 O.sub.6 358.34 78 62 Cal.Obt. 60.3360.52      5.065.10 7.827.92       62 " " "      ##STR110##       " C.sub.20 H.sub.22 N.sub.2 O.sub.6 386.39 74 60 Cal.Obt. 62.1662.16      5.745.94 7.257.49       63 " " "      ##STR111##       " C.sub.23 H.sub.26 N.sub.2 O.sub.6 426.45 78 60 Cal.Obt. 64.7764.51      6.156.18 6.576.50  64 " " " CH.sub.2       OCH.sub.3      ##STR112##       C.sub.18 H.sub.18 FNO.sub.4 331.33 106  55 Cal.Obt. 65.2565.37 5.485.52 4      .234.20       65 " " " "      ##STR113##       C.sub.19 H.sub.18 N.sub.2 O.sub.4 338.35 88 65 Cal.Obt. 67.4467.41      5.365.48 8.288.37       66 " " " "      ##STR114##       C.sub.19 H.sub.18 F.sub.3 NO.sub.4 381.34 83 60 Cal.Obt. 59.8459.81     4      4.76.62 3.673.70       67 " " " "      ##STR115##       C.sub.18 H.sub.18 FNO.sub.4 331.33 79 60 Cal.Obt. 65.2565.20 5.485.59      4.234.13       68 " " " "      ##STR116##       C.sub.18 H.sub.18 ClNO.sub.4 347.79 107  65 Cal.Obt. 62.1662.02      5.225.23 4.034.05  69 " " " CH.sub.2       OEt      ##STR117##       C.sub.19 H.sub.20 N.sub.2 O.sub.6 372.37 50 48 Cal.Obt. 61.2861.10      5.415.34 7.527.48  70 " " " CH.sub.2 OC.sub.3 H.sub.7n " C.sub.20      H.sub.22 N.sub.2 O.sub.6 386.39 52 75 Cal. 62.16 5.74 7.25      Obt. 62.09 5.63 7.06       71 " " "      ##STR118##       " C.sub.20 H.sub.20 N.sub.2 O.sub.6 384.38 <50  40 Cal.Obt. 62.4962.38      5.245.12 7.297.17       72 " " "      ##STR119##       " C.sub.20 H.sub.18 N.sub.2 O.sub.6 382.36 80 55 Cal.Obt. 62.8262.75      4.754.76 7.337.23       73 " " "      ##STR120##       " C.sub.19 H.sub.20 N.sub.2 O.sub.7 388.37 79 50 Cal.Obt. 58.7658.53      5.195.26 7.217.20  74 " " " CH.sub.2NHCH.sub.3 4OC.sub.4 H.sub.9n      C.sub.15 H.sub.22 N.sub.2 O.sub.3 278.34 56 75 Cal. 64.72 7.97 10.07            Obt. 64.57 7.81 10.18       75 " " "      ##STR121##       " C.sub.16 H.sub.24 N.sub.2 O.sub.3 292.37 68 70 Cal.Obt. 65.7365.73      8.278.01 9.589.49       76 " " " CH.sub.2NH.sub.2      ##STR122##       C.sub.16 H.sub.22 N.sub.2 O.sub.3 290.35 97 72 Cal.Obt. 66.1866.33      7.647.96 9.659.79  77 " " " CH.sub.2NHCH.sub.3 " C.sub.17 H.sub.24      N.sub.2 O.sub.3 304.38 71 70 Obt. 67.08 7.95 9.20           Obt. 66.85      7.96 9.14       78 " " "      ##STR123##       ##STR124##       C.sub.18 H.sub.26 N.sub.2 O.sub.3 318.40 102  65 Cal.Obt. 67.8967.88      8.238.43 8.808.73       79 " " " CH.sub.2NHCH.sub.3      ##STR125##       C.sub.16 H.sub.24 N.sub.2 O.sub.3 292.37 67 62 Cal.Obt. 65.7365.44      8.278.23 9.589.73       80 " " " CH.sub.2NH.sub.2      ##STR126##       C.sub.17 H.sub.18 N.sub.2 O.sub.3 298.33 124  74 Cal.Obt. 68.4468.25      6.086.19 9.398.82  81 " " " CH.sub.2NHCH.sub.3 " C.sub.18 H.sub.20      N.sub.2 O.sub.3 312.36 88 71 Cal. 69.21 6.45 8.97           Obt. 69.51      6.36 8.42       82 " " " CH.sub.2NH.sub.2      ##STR127##       C.sub.17 H.sub.17 ClN.sub.2 O.sub.3 332.78 122  70 Cal.Obt. 61.3561.04      5.155.20 8.427.66  83 " " " CH.sub.2NHCH.sub. 3 " C.sub.18 H.sub.19      ClN.sub.2 O.sub.3 346.81 72 55 Cal.Obt. 62.3361.93 5.525.35 8.088.35  84      " " " CH.sub.2NH.sub.2       ##STR128##       C.sub.17 H.sub.17 N.sub.3 O.sub.5 343.33 88 50 Cal.Obt. 59.4759.21      4.994.71 12.2412.54  85 " " " CH.sub.2NHCH.sub.3 " C.sub.18 H.sub.19      N.sub.3 O.sub.5 357.36 70 75 Cal. 60.49 5.36 11.76           Obt. 60.18      5.39 11.83       86 " " "      ##STR129##       " C.sub.19 H.sub.21 N.sub.3 O.sub.5 371.38 76 72 Cal.Obt. 61.4461.54      5.705.84 11.3211.29  87 Sulfur " " CH.sub.2 OH 4-OEt C.sub.12 H.sub.15      NO.sub.3 S 253.31 133  46 Cal. 56.89 5.97 5.53           Obt. 56.98 6.14      5.54 88 " " " " 4OC.sub.3 H.sub.7n C.sub.13 H.sub.17 NO.sub.3 S 267.34      84 42 Cal. 58.40 6.41 5.24           Obt. 58.55 6.59 5.25 89 " " " "      4OC.sub.4 H.sub.9n C.sub.14 H.sub.19 NO.sub.3 S 281.37 95 55 Cal. 59.76      6.81 4.98           Obt. 59.64 6.80 4.86       90 " " " "      ##STR130##       C.sub.17 H.sub.23 NO.sub.3 S 321.43 100  40 Cal.Obt. 63.5263.27      7.217.01 4.364.15       91 " " " "      ##STR131##       C.sub.15 H.sub.21 NO.sub.3 S 295.39 80 40 Cal.Obt. 60.9960.75 7.177.10      4.744.74       92 " " " "      ##STR132##       C.sub.12 H.sub.11 N.sub. 2 O.sub.3 S 263.29 96 35 Cal.Obt. 54.7454.49      4.214.64 10.6410.70       93 " " " "      ##STR133##       C.sub.17 H.sub.16 ClNO.sub.3 S 349.83 132  40 Cal.Obt. 58.3658.17      4.614.61 4.004.00       94 " " " CH.sub.2OH      ##STR134##       C.sub.17 H.sub.16 N.sub.2 O.sub.3 S 360.38 142  37 Cal.Obt. 56.6556.36      4.484.29 7.777.58       95 " " " "      ##STR135##       C.sub.17 H.sub.16 ClNO.sub.3 S 349.83 163  42 Cal.Obt. 58.3658.31      4.614.55 4.003.98       96 " " " "      ##STR136##       C.sub.17 H.sub.16 FNO.sub.3 S 333.37 142  55 Cal.Obt. 61.2460.99      4.844.83 4.203.92       177 " " " "      ##STR137##         " " 153  37 Cal.Obt. 61.2460.94 4.844.78 4.204.10  97 " " " "       ##STR138##       C.sub.18 H.sub.16 N.sub.2 O.sub.3 S 340.39 162  40 Cal.Obt. 63.5163.30      4.745.00 8.238.08       98 " " " "      ##STR139##       C.sub.18 H.sub.16 F.sub.3 NO.sub.3 S 383.38 95 52 Cal.Obt. 56.3956.08      4.214.14 3.653.30       99 Oxygen CH.sub.2 " "      ##STR140##       C.sub.18 H.sub.18 N.sub.2 O.sub.5 342.34 96 85 Cal.Obt. 63.1562.98      5.305.31 8.187.96       100 Sulfer Oxygen " "      ##STR141##       C.sub.16 H.sub.21 NO.sub.3 S 307.40 63 40 Cal.Tr. 62.5162.33 6.896.90      4.564.56       101 " " " "      ##STR142##       C.sub.17 H.sub.21 NO.sub.3 S 319.41 112  35 Cal.Tr. 63.9263.64 6.636.76 4      .394.17       102 " " " "      ##STR143##       C.sub.13 H.sub.14 N.sub.2 O.sub.3 S 278.32 108  43 Cal.Tr. 56.1055.80      5.075.05 10.079.87       103 Oxygen " "      ##STR144##       ##STR145##       C.sub.21 H.sub.29 NO.sub.5 375.45 98 76 Cal.Tr. 67.1867.47 7.797.87     3      3.73.97  104 " " " CH.sub.2 OCOC.sub.4 H.sub.9n "  C.sub.22 H.sub.31      NO.sub.5 389.47 96 76 Cal. 67.84 8.02 3.60           Obt. 67.91 8.01      3.54       105 " " "      ##STR146##       " C.sub.22 H.sub.31 NO.sub.5 389.47 120  73 Cal.Obt. 67.8467.86      8.028.10 3.603.45  106 " " " CH.sub.2       OCOEt      ##STR147##       C.sub.20 H.sub.20 FNO.sub.5 373.37 77 80 Cal.Obt. 64.3364.28 5.405.27      3.753.73       107 " " "      ##STR148##       " C.sub.21 H.sub.22 FNO.sub.5 387.39 87 62 Cal.Obt. 65.1065.19 5.725.78 3      .623.60  108 " " " CH.sub.2 OCOC.sub.4 H.sub.9n " C.sub.22 H.sub.24      FNO.sub.5 401.42 92 71 Cal. 65.82 6.03 3.49           Obt. 65.83 5.86      3.42 109 " " " CH.sub.2 OEt 4-OC.sub.4 H.sub.9 n C.sub.16 H.sub.23      NO.sub.4 293.35 64 32 Cal. 65.50 7.90 4.78           Obt. 65.63 8.08      4.67  110 " " " CH.sub.2       OCH.sub.3      ##STR149##       C.sub.15 H.sub.18 N.sub.2 O.sub.4 290.31 54 68 Cal.Obt. 62.0562.07      6.256.42 9.659.61       111 " " " "      ##STR150##       C.sub.16 H.sub.23 NO.sub.4 293.35 50 65 Cal.Obt. 65.5065.52 7.908.03      4.784.71  112 O O " " 4-O(CH.sub.2).sub.4CN C.sub.16 H.sub.20 N.sub.2      O.sub.4 304.34 78 50 Cal. 63.14 6.62 9.21           Obt. 63.00 6.45 9.09       113 Sulfur Oxygen " CH.sub.2       OH      ##STR151##       C.sub.17 H.sub.15 NClO.sub.5 S 394.83 144  58 Cal.Obt. 51.7151.87      3.833.87 7.107.34  114 " " " CH.sub.2       OCH.sub.3      ##STR152##       C.sub.18 H.sub.25 NO.sub.3 S 335.45 102  76 Cal.Obt. 64.4464.35      7.517.46 4.184.12  115 " " " CH.sub.2 OCOCH.sub.3 " C.sub.19 H.sub.25      NO.sub.4 S 363.46 96 52 Cal. 62.78 6.93 3.85           Obt. 62.64 7.00      3.85  116 " " " CH.sub.2       OCH.sub.3      ##STR153##       C.sub.19 H.sub.18 N.sub.2 O.sub.3 S 354.42 108  61 Cal.Obt. 64.3864.37      5.124.82 7.907.76  117 " " " CH.sub.2       OCOCH.sub.3      ##STR154##       C.sub.19 H.sub.18 N.sub.2 O.sub. 6 S 402.42 104  71 Cal.Obt. 56.7156.91 4      .514.28 6.966.73  118 " " " CH.sub.2 OCH.sub.3 " C.sub.18 H.sub.18      N.sub.2 O.sub.5 S 374.41 97 67 Cal. 57.74 4.85 7.46           Obt. 57.60      4.77 7.40  119 " " " CH.sub.2       OH      ##STR155##       C.sub.16 H.sub.21 NO.sub.4 S 323.40 117  58 Cal.Obt. 59.4259.17      6.556.62 4.334.26  120 " " " CH.sub.2       OCOCH.sub.3      ##STR156##       C.sub.20 H.sub.18 N.sub.2 O.sub.4 S 382.43 99 82 Cal.Obt. 62.8162.88      4.744.67 7.337.33       121 Oxygen " "      ##STR157##       ##STR158##       C.sub.24 H.sub.33 NO.sub.5 415.51 128  87 Cal.Obt.  69.3769.33 8.017.99 3      .373.29  122 " " " CH.sub.2 OCOC.sub.8 H.sub.17n " C.sub.26 H.sub.39      NO.sub.5 445.58 82 78 Cal. 70.08 8.823.14 Obt. 70.01 8.67 3.06  123 " "      " CH.sub.2       OCOCH.sub.3      ##STR159##       C.sub.17 H.sub.23 NO.sub.5 321.36 80 60 Cal.Obt. 63.5363.66 7.217.36      4.364.39  124 " " " CH.sub.2 OCOEt " C.sub.18 H.sub.25 NO.sub.5 335.39      78 60 Cal. 64.46 7.51 4.18           Obt. 64.35 6.96 4.25  125 " " "       ##STR160##       " C.sub.20 H.sub.29 NO.sub.5 363.24 75 74 Cal.Obt. 66.0965.91 8.047.73      3.853.80  126 " " " CH.sub.2 OCOC.sub.8 H.sub.17n " C.sub.24 H.sub.37      NO.sub.5 419.54 67 72 Cal. 68.70 8.89 3.34           Obt. 68.41 8.93      3.19       127 " " "      ##STR161##       " C.sub.19 H.sub.27 NO.sub.5 349.41 64 76 Cal.Obt. 65.3165.24 7.797.88      4.013.98  128 " " " CH.sub.2 OCOC.sub.4 H.sub.9n " C.sub.20 H.sub.29      NO.sub.5 363.44 70 64 Cal. 66.09 8.04 3.85           Obt. 65.96 7.85      3.70       129 " " "      ##STR162##       " C.sub.22 H.sub.31 NO.sub.5 389.48 81 68 Cal.Obt. 67.8467.66 8.028.03      3.603.71  130 " " " CH.sub.2       OCOCH.sub.3      ##STR163##       C.sub.19 H.sub.18 FNO.sub.5 359.34 60 65 Cal.Obt. 63.5063.28 5.045.14      3.893.70  131 " " " CH.sub.2 OCOC.sub.8 H.sub.17n " C.sub.26 H.sub.32      FNO.sub.5 457.52 73 73 Cal. 68.24 7.05 3.06           Obt. 68.30 6.96      3.16  132 " " " CH.sub.2       OCOEt      ##STR164##       C.sub.21 H.sub.20 N.sub.2 O.sub.5 380.39 90 78 Cal.Obt. 66.3066.31      5.305.52 7.367.24  133 " " " CH.sub.2 OCOC.sub.8 H.sub.17n " C.sub.27      H.sub.32 N.sub.2 O.sub.5 464.54 72 77 Cal. 69.80 6.94 6.03      Obt. 69.63 7.15 5.91       134 " " "      ##STR165##       ##STR166##       C.sub.22 H.sub.24 N.sub.2 O.sub.7 428.43 84 40 Cal.Obt. 61.6761.31      5.655.50 6.546.28  135 " " " CH.sub.2       OCOEt      ##STR167##       C.sub.20 H.sub.20 FNO.sub.5 373.37 87 81 Cal.Obt. 64.3364.51 5.405.12      3.753.70  136 " " " CH.sub.2 OCOC.sub.8 H.sub.17n " C.sub.26 H.sub.32      FNO.sub.5 457.52 94 83 Cal. 68.25 7.05 3.06           Obt. 68.54 6.82      2.97  137 " " " CH.sub.2       OCOEt      ##STR168##       C.sub.20 H.sub.19 ClN.sub.2 O.sub.7 434.82 104  73 Cal.Obt. 55.2454.93      4.404.11 6.446.35  138 " " " CH.sub.2 OCOC.sub.8 H.sub.17n " C.sub.26      H.sub.31 ClN.sub.2 O.sub.7 518.99 102  87 Cal. 60.17 6.02 5.40      Obt. 60.02 5.82 5.35  139 " " " CH.sub.2 OCOC.sub.8       H.sub.17n      ##STR169##       C.sub.27 H.sub.31 N.sub.3 O.sub.7 509.54 100  70 Cal.Obt. 63.6463.51      6.135.99 8.258.24  140 " " " CH.sub.2 OCOEt " C.sub.21 H.sub.19 N.sub.3      O.sub.7 425.39 145  50 Cal. 59.29 4.50 9.88           Obt. 58.67 4.33      9.78  141 " " " CH.sub.2 OCOCH.sub.2       OCH.sub.3      ##STR170##       C.sub.20 H.sub.20 N.sub.2 O.sub.8 416.38 125  55 Cal.Obt. 57.6957.63      4.844.78 6.736.58  142 " " " CH.sub.2 OC.sub.3 H.sub.7n 4OC.sub.4      H.sub.9n C.sub.17 H.sub.25 NO.sub.4 307.38 72 52 Cal. 66.42 8.20 4.56             Obt. 66.35 8.39 4.72       143 " " " "      ##STR171##       C.sub.19 H.sub.27 NO.sub.4 333.41 72 63 Cal.Obt. 68.4468.20 8.167.89      4.204.11  144 " " " CH.sub.2       OCH.sub.3      ##STR172##       C.sub.17 H.sub.23 NO.sub.5 321.36 100  81 Cal.Obt. 63.5363.36 7.217.09      4.364.27  145 " " " CH.sub.2 OC.sub.3       H.sub.7      ##STR173##       C.sub.16 H.sub.20 N.sub.2 O.sub.4 304.34 40 38 Cal.Obt. 63.1462.96      6.626.31 9.218.96  146 " " " CH.sub.2       OEt      ##STR174##       C.sub.18 H.sub.25 NO.sub.4 319.39 82 79 Cal.Obt. 67.6967.44 7.897.95      4.394.36       147 " " " "      ##STR175##       C.sub.15 H.sub.18 N.sub.2 O.sub.4 290.31 77 41 Cal.Obt. 62.0562.15      6.255.97 9.659.61   148 " " " CH.sub.2 OCH.sub.3 4OC.sub.5 H.sub.11n      C.sub.16 H.sub.23 NO.sub.4 293.35 58 82 Cal. 65.50 7.90 4.78      Obt. 65.45 7.91 4.68 149 " " " CH.sub.2 OCH.sub.3 4OC.sub.6 H.sub.13n      C.sub.17 H.sub.25 NO.sub.4 307.38 ≦50  76 Cal. 66.42 8.20 4.56             Obt. 66.43 8.12 4.44       150 " " " "      ##STR176##       C.sub.19 H.sub.27 NO.sub.4 333.41 71 32 Cal.Obt. 68.4468.35 8.168.17      4.204.37       151 " " " "      ##STR177##       C.sub.14 H.sub.17 NO.sub.5 279.28 58 85 Cal.Obt. 60.2059.94 6.146.02      5.025.11  152 " " " CH.sub.2 OC.sub.3       H.sub.7n      ##STR178##       C.sub.20 H.sub.23 NO.sub.4 341.39 105   67 Cal.Obt. 70.3670.17 6.796.80 4      .103.86       153 " " " "      ##STR179##       C.sub.20 H.sub.22 ClNO.sub.4 375.84 75 71 Cal.Obt. 63.9163.95 5.906.07      3.733.93  154 " " " CH.sub.2       OEt      ##STR180##       C.sub.19 H.sub.21 NO.sub.4 327.37 105  85 Cal.Obt. 69.7069.44 6.476.48      4.284.23       155 " " " "      ##STR181##       C.sub.19 H.sub.20 ClNO.sub.4 361.81 81 82 Cal.Obt. 63.0762.89 5.575.38      3.873.80  156 " " " CH.sub.2       OCH.sub.3      ##STR182##       C.sub.18 H.sub.17 ClN.sub.2 O.sub.6 392.79 110  64 Cal.Obt. 55.0454.98      4.36 4.35 7.137.17       157 " " "      ##STR183##       ##STR184##       C.sub.21 H.sub.24 N.sub.2 O.sub.6 400.42 76 62 Cal.Obt. 62.9962.68      6.045.79 70036.85       158 " " "      ##STR185##       " C.sub.22 H.sub.26 N.sub.2 O.sub.6 414.44 70 59 Cal.Obt. 63.7563.49      6.326.11 6.766.62  159 " " " CH.sub.2       OCH.sub.3      ##STR186##       C.sub.19 H.sub.18 N.sub.2 O.sub.4 338.35 110  78 Cal.Obt. 67.4467.21      5.365.06 8.288.20  160 " " " CH.sub.2 OC.sub.3       H.sub.7n      ##STR187##       C.sub.21 H.sub.22 N.sub.2 O.sub.4 366.40 75 60 Cal.Obt. 68.8368.51      6.055.98 7.657.67  161 " " " CH.sub.2       OCH.sub.3      ##STR188##       C.sub.19 H.sub.17 N.sub.3 O.sub.6 383.35 163  52 Cal.Obt. 59.6359.50      4.474.60 10.9610.85       162 " " " "      ##STR189##       C.sub.19 H.sub.17 FN.sub.2 O.sub.4 356.34 93 58 Cal.Obt. 64.0463.78     4      4.81.80 7.867.71       163 " " " "      ##STR190##       C.sub.18 H.sub.17 ClFNO.sub.4 365.78 90 34 Cal.Obt. 59.1059.40 4.684.55 3      .834.07       164 " " " "      ##STR191##       C.sub.18 H.sub.17 Cl.sub.2 NO.sub.4 382.24 93 83 Cal. Obt. 56.5656.45      4.484.23 3.663.66       165 " " " "      ##STR192##       C.sub.18 H.sub.18 N.sub.2 O.sub.6 358.34 134  75 Cal.Obt. 60.3360.08      5.064.74 7.827.55       166 " " " "      ##STR193##       C.sub.18 H.sub.17 Cl.sub.2 NO.sub.4 382.24 76 69 Cal.Obt. 56.5656.47      4.484.46 3.663.73  167 " " " CH.sub.2       OEt      ##STR194##       C.sub.20 H.sub.20 N.sub.2 O.sub.4 352.38 ≦50  57 Cal.Obt.      68.1767.93 5.725.50 7.958.04  168 " " " CH.sub.2       OCH.sub.3      ##STR195##       C.sub.18 H.sub.17 ClN.sub.2 O.sub.6 392.79 94 67 Cal.Obt. 55.0455.04      4.364.25 7.137.40       169 " " " "      ##STR196##       C.sub.18 H.sub.17 FN.sub.2 O.sub.6 376.33 95 61 Cal.Obt. 57.4457.30     4      4.55.56 7.447.29  170 " " " CH.sub.2 NH.sub.2 4OC.sub.4 H.sub.9n      C.sub.14 H.sub.20 N.sub.2 O.sub.3 264.32 90 26 Cal. 63.61 7.63 10.60            Obt. 63.31 7.47 10.60       171 " " "      ##STR197##       ##STR198##       C.sub.15 H.sub.19 N.sub.3 O.sub.3 289.33 97 17 Cal.Obt. 62.2662.43      6.626.52 14.5214.46       172 " " " "      ##STR199##       C.sub.17 H.sub.24 N.sub.2 O.sub.3 304.38 98 43 Cal.Obt.  67.0867.15     7      7.95.87 9.208.92  173 " " " CH.sub.2 NHCH.sub.3 " C.sub.18 H.sub.26      N.sub.2 O.sub.3 318.40 96 32 Cal. 67.89 8.23 8.30           Obt. 68.29      8.17 3.30  174 " " " CH.sub.2       NH.sub.2      ##STR200##       C.sub.15 H.sub.22 N.sub.2 O.sub.3 278.34 84 45 Cal.Obt. 64.7264.80      7.977.91 10.0710.16  175 " " " CH.sub.2       NHCH.sub.3      ##STR201##       C.sub.18 H.sub.19 N.sub.2 O.sub.3 F 330.35 85 36 Cal.Obt. 65.4465.45      5.805.82 8.488.34  176 " " " CH.sub.2 NH.sub.2 " C.sub.17 H.sub.17      N.sub.2 O.sub.2 F 316.32 129  29 Cal. 44.54 5.42 8.86           Obt.      64.29 5.46 8.65       ##STR202##                     178 O O H      ##STR203##       ##STR204##       C.sub.25 H.sub.22 N.sub.2 O.sub.8 478.44 120  64 Cal.Obt. 62.7662.89      4.644.66 5.865.84  179 " " " CH.sub.2       OCH.sub.3      ##STR205##       C.sub.15 H.sub.19 NO.sub.4 277.31 63 74 Cal.Obt. 64.9664.67 6.916.77      5.054.97       180 " " " "      ##STR206##       C.sub.13 H.sub.18 N.sub.2 O.sub.3 250.29 92 59 Cal.Obt. 62.3862.45      7.256.98 11.1910.94       181 " " " "      ##STR207##       C.sub.17 H.sub.24 N.sub.2 O.sub.5 336.38 92 75 Cal.Obt. 60.7060.47      7.197.04 8.338.10       182 " " " "      ##STR208##       C.sub.17 H.sub.23 NO.sub.5 321.36 77 22 Cal.Obt. 63.5363.67 7.217.23      4.364.38       183 " " " "      ##STR209##       C.sub.16 H.sub.21 NO.sub.4 291.34 81 31 Cal.Obt. 65.9666.00 7.277.46      4.814.71       184 " " " "      ##STR210##       C.sub.17 H.sub.21 NO.sub.4 303.35 83 33 Cal.Obt. 67.3167.01 6.987.08      4.624.43       185 "  " " "      ##STR211##       C.sub.16 H.sub.21 NO.sub.4 291.34 84 78 Cal.Obt. 65.9666.03 7.277.28      4.814.59  234 " " " " 4O(CH.sub.2).sub.4 Cl C.sub.15 H.sub.20 ClNO.sub.4      313.77 58 66 Cal. 57.41 6.42 4.46           Obt. 57.05 6.50 4.50  186 "      " " "       ##STR212##       C.sub.18 H.sub.25 NO.sub.4 319.39 77 22 Cal.Obt. 67.6967.62 7.898.03      9.394.25       187 " " " "      ##STR213##       C.sub.19 H.sub.19 NO.sub.3 309.35 166  26 Cal.Obt. 73.7663.52 6.196.10      4.534.38       188 " " " "      ##STR214##       C.sub.18 H.sub.23 NO.sub.5 333.37 102  70 Cal.Obt. 64.8564.82 6.957.11      4.204.19       189 " " " "      ##STR215##       C.sub.19 H.sub.17 NO.sub.3 307.33 120  50 Cal.Obt. 74.2574.18 5.585.30      4.564.47       190 " " " "      ##STR216##       C.sub.19 H.sub.18 NO.sub.3 Cl 343.80 136  30 Cal.Obt. 66.3766.08      5.285.24 4.073.90       191 " " " "      ##STR217##       C.sub.19 H.sub.18 N.sub.2 O.sub.5 354.35 110  50 Cal.Obt. 64.4064.17      5.125.24 7.917.96       192 " " " "      ##STR218##       C.sub.19 H.sub.21 NO.sub.3 311.37 74 62 Cal.Obt.  73.2973.17 6.806.93      4.504.53       193 " " " "      ##STR219##       C.sub.19 H.sub.19 NO.sub.3 309.35 82 60 Cal.Obt. 73.7673.47 6.196.10      4.634.50       194 " " " "      ##STR220##       C.sub.19 H.sub.18 N.sub.2 O.sub.5 354.35 Oil 40 Cal.Obt. 64.4064.25     5      5.12.27 7.917.92       195 " " " "      ##STR221##       C.sub.17 H.sub.17 NO.sub.3 283.31 120  75 Cal.Obt. 72.0672.27 6.055.91      4.944.62       196 " " " "      ##STR222##       C.sub.20 H.sub.18 N.sub.2 O.sub.3 334.36 127  70 Cal.Obt. 71.8471.89       5.435.36 8.388.45       197 " " " "      ##STR223##       C.sub.18 H.sub.18 BrNO.sub.4 392.24 116  81 Cal.Obt. 55.1154.94      4.634.35 3.573.55       198 " " " "      ##STR224##       C.sub.18 H.sub.18 NIO.sub.4 439.24 118  78 Cal.Obt. 49.2249.39 4.134.08 3      .193.13       199 " " " "      ##STR225##       C.sub.19 H.sub.18 N.sub.2 O.sub.4[α].sub.D.sup.20 = -39° 7 3      38.35(C = 1/CH.sub.2 Cl.sub.2) 83 75 Cal.Obt. 67.4467.14 5.365.53      8.288.38       200 " " " "      ##STR226##       C.sub.19 H.sub.18 N.sub.2 O.sub.4[α].sub.D.sup.20 = +32° 1 3      38.35(C = 1/CH.sub.2 Cl.sub.2) 84 51 Cal.Obt. 67.4467.52 5.365.36      8.288.28       201 " " "      ##STR227##       ##STR228##       C.sub.20 H.sub.23 N.sub.3 O.sub.5 385.41 76 36 Cal.Obt. 62.3262.04      6.025.90 10.9010.75       202 " " "      ##STR229##       " C.sub.21 H.sub.23 N.sub.3 O.sub.6 413.42 138  26 Cal.Obt. 61.0161.11      5.615.67 10.1710.01  203 " " " CH.sub.2NHEt " C.sub.19 H.sub.21 N.sub.3      O.sub.5 371.38 70 54 Cal. 61.44 5.70 11.32           Obt. 61.48 5.58      11.57       204 " " "      ##STR230##       " C.sub.21 H.sub.23 N.sub.3 O.sub.5 397.42 110  24 Cal.Obt. 63.4663.16      5.835.90 10.5710.39       205 " " " CH.sub.2NH.sub.2      ##STR231##       C.sub.18 H.sub.17 N.sub.3 O.sub.3 323.34 94 10 Cal.Obt. 66.8666.73      5.305.58 13.0012.69       206 " " "      ##STR232##       " C.sub.20 H.sub.21 N.sub.3 O.sub.3 351.39 84 62 Cal.Obt. 68.3668.38      6.026.30 11.9611.68       207 " " " CH.sub.2NH.sub.2      ##STR233##       C.sub.17 H.sub.16 ClN.sub.3 O.sub.5 475.06 155  11 Cal.Obt. 54.0454.17      4.274.31 11.1211.26  208 S " " CH.sub.2       OCOEt      ##STR234##       C.sub.20 H.sub.20 N.sub.2 O.sub.6 S 416.44 126  73 Cal.Obt. 57.6857.59      4.845.03 6.736.69  209 " " " CH.sub.2       OH      ##STR235##       C.sub.18 H.sub.15 FN.sub.2 O.sub.3 S 358.38 126  27 Cal.Obt. 59.5759.72 4      .314.52 7.727.54  210 " " " CH.sub.2 OC.sub.3       H.sub.7n      ##STR236##       C.sub.20 H.sub.22 N.sub.2 O.sub.5 S 402.46 110  57 Cal.Obt. 59.6859.57      5.515.65 6.967.19  211 " " " CH.sub.2       OCH.sub.3      ##STR237##       C.sub.17 H.sub.23 NO.sub.3 S 321.43 68 35 Cal.Obt. 63.5263.61 7.217.43      4.364.33  212 " " " CH.sub.2 OH 4O(CH.sub.2).sub.3CN C.sub.14 H.sub.16      N.sub.2 O.sub.3 S 292.35 80 54 Cal. 57.51 5.52 9.58           Obt. 57.40      5.32 9.42  213 " " " CH.sub.2       OCH.sub.3      ##STR238##       C.sub.17 H.sub.18 N.sub.2 O.sub.3 S 460.95 133  17 Cal.Obt. 51.8551.86      4.574.40 6.086.04       214 " " " "      ##STR239##       C.sub.16 H.sub.33 NO.sub.3 S 309.42 Oil 30 Cal.Obt. 62.1062.41 7.497.61 4      .534.45  215 " " " CH.sub.2 OH 4O(CH.sub.2).sub.4CN C.sub.15 H.sub.18      N.sub.2 O.sub.3 S 306.37 106  40 Cal. 58.40 5.92 9.14           Obt.      58.88 5.74 9.12  216 " " " CH.sub.2       OEt      ##STR240##       C.sub.19 H.sub.20 N.sub.2 O.sub.5 S 388.43 80 47 Cal.Obt. 58.7558.68      5.195.09 7.217.28  217 " " " CH.sub.2 OCH.sub.3 4O(CH.sub.2).sub.4CN      C.sub.16 H.sub.20 N.sub.2 O.sub.3 S 320.40 Oil 24 Cal. 59.97 6.29 8.74              Obt. 59.81 6.28 9.02       218 " " " "      ##STR241##       C.sub.19 H.sub.17 N.sub.3 O.sub.5 S 399.42 176  57 Cal.Obt. 57.1357.06      4.294.19 10.5210.46       219 O S H "      ##STR242##       C.sub.18 H.sub.18 N.sub.2 O.sub.5 S 374.41 74 47 Cal.Obt. 57.7457.45      4.854.97 7.487.18  220 H.sub.2 CH.sub.2 H CH.sub.2       OH      ##STR243##       C.sub.18 H.sub.21 NO.sub.4 283.36 87 85 Cal.Obt. 76.2976.40 7.477.60      4.944.65

                                      TABLE II                                     __________________________________________________________________________      ##STR244##                                 (IX)                                                         Melting                                              Code          Empirical                                                                            Molecular                                                                            Point                                                                               Yield                                                                              Elementary Analysis                         Number                                                                              R.sub.6  Formula                                                                              Weight                                                                               (°C.)                                                                        %      C  H  N                                  __________________________________________________________________________     226  C.sub.3 H.sub.7n                                                                        C.sub.20 H.sub.23 NO.sub.4                                                           341.39                                                                               105  62  Cal.                                                                              70.36                                                                             6.79                                                                              4.10                                                                  Obt.                                                                              70.17                                                                             6.80                                                                              3.86                               227  Et       C.sub.19 H.sub.21 NO.sub.4                                                           327.37                                                                               105  58  Cal.                                                                              69.70                                                                             6.47                                                                              4.28                                                                  Obt.                                                                              69.44                                                                             6.48                                                                              4.23                               228                                                                                  ##STR245##                                                                             C.sub.21 H.sub.25 NO.sub.4                                                           355.42                                                                               107  61  Cal. Obt.                                                                         70.96 71.09                                                                       7.09  6.77                                                                        3.94 3.70                          229                                                                                  ##STR246##                                                                             C.sub.22 H.sub.27 NO.sub.4                                                           369.44                                                                               101  61  Cal. Obt.                                                                         71.52 71.71                                                                       7.37 7.41                                                                         3.79 3.83                          __________________________________________________________________________

                                      TABLE III                                    __________________________________________________________________________      ##STR247##                                          (VIII)                                                        Melting  ELEMENTARY                                                            Point                                                                               Yield                                                                               ANALYSIS                         Code Number                                                                            R'.sub.6 Empirical Formula                                                                        Molecular Weight                                                                        (°C.)                                                                        (%)    C  H  N                        __________________________________________________________________________     221                                                                                     ##STR248##                                                                             C.sub.13 H.sub.17 NO.sub.4                                                               251.27   93   70  Cal. Obt.                                                                         62.14 62.14                                                                       6.82 6.80                                                                         5.57 5.56                222     CH.sub.3 C.sub.11 H.sub.13 NO.sub.4                                                               223.22   106  81  Cal.                                                                              59.18                                                                             5.87                                                                              6.28                                                                  Obt.                                                                              59.15                                                                             6.01                                                                              6.38                     223                                                                                     ##STR249##                                                                             C.sub.16 H.sub.21 No.sub.4                                                               291.34   108  92  Cal. Obt.                                                                         65.96 66.17                                                                       7.27 7.58                                                                         4.81 5.01                224     C.sub.3 H.sub.7n                                                                        C.sub.13 H.sub. 17 NO.sub.4                                                              251.27   80   78  Cal. Obt.                                                                         62.14 62.16                                                                       6.82 6.53                                                                         5.57 5.6                 230     Et       C.sub.12 H.sub.15 NO.sub.4                                                               237.25   86   81  Cal.                                                                              60.75                                                                             6.37                                                                              5.90                                                                  Obt.                                                                              60.60                                                                             6.21                                                                              5.83                     231                                                                                     ##STR250##                                                                             C.sub.14 H.sub.19 NO.sub.4                                                               265.30   98   85  Cal. Obt.                                                                         63.38 63.28                                                                       7.22 7.04                                                                         5.28 5.39                232                                                                                     ##STR251##                                                                             C.sub.15 H.sub.21 NO.sub.4                                                               279.33   80   82  Cal. Obt.                                                                         64.49 64.30                                                                       7.58 7.42                                                                         5.01 4.84                __________________________________________________________________________

The compounds of formula (I) were studied on laboratory animals and showed activities in the psychotropic field, as potential anti-depressants.

These activities were revealed in the following tests:

Test A: Potentiation in mice of generalized trembling caused by an interperitoneal injection (200 mg/kg) of dl-5-hydroxytryptophane, following the protocol described by C. GOURET and G. RAYNAUD in J. Pharmacol. (Paris), (1974), 5, 231.

Test B: Antagonism with respect to the ptosis observed one hour after an intravenous injection (2 mg/kg) of reserpine given to mice, following the protocol described by C. GOURET and J. THOMAS in J. Pharmacol. (Paris), 1973, 4, 401.

The results of these two tests, as well as those of a well-know reference substance, TOLOXATONE, are collected in table IV below:

                  TABLE IV                                                         ______________________________________                                                                           Toxicity                                     Compound    Test A    Test B      LD/50                                        tested      ED/50/    ED/50/      Mouse                                        Code Number mg/kg/po  mg/kg/po    /mg/kg/po                                    ______________________________________                                         1           12.5      6.2                                                      2           12.5      8                                                        3           3.1       2.7         >2000                                        4           2.3       3.4                                                      5           4.7       9.5                                                      6           2.4       6                                                        7           --        7.4                                                      8           2.2       7.2                                                      9           --        25                                                       10          2.4       5.8                                                      11          4.2       6.2                                                      12          4.6       6                                                        13          3         2           >2000                                        14          2         3.1                                                      15          2.2       2                                                        16          1.7       1.5                                                      17          4.8       3.6                                                      18          4         4.25                                                     19          5.5       3.5                                                      20          8.8       3.7                                                      21          2.1       3.5                                                      22          --        3                                                        23          12        12.5                                                     24          9         12.5        >2000                                        25          15        25                                                       26          12.5      20                                                       27          25        44                                                       28          32        20                                                       29          45        50                                                       30          4.2       4.5                                                      31          6.5       3.6                                                      32          4.7       3.6                                                      33          9.4       4.5                                                      34          7         7.5                                                      35          19        6.5                                                      36          1.7       1.5                                                      37          1.9       2                                                        38          1.5       2                                                        39          1.75      1.6                                                      40          6.2       1.5                                                      41          6.2       4.5                                                      42          1.25      2                                                        43          15        17.5                                                     44          6.2       --                                                       45          45        50                                                       46          1.5       2                                                        47          18        36                                                       48          50        50                                                       49          0.5       0.4         2000                                         50          17.5      15                                                       51          27        50                                                       52          1.2       --          >2000                                        53          5         5.8                                                      54          14        12.5                                                     55          0.6       1.1                                                      56          --        3                                                        57          7.8       9                                                        58          50        8.8                                                      59          3.4       3.1                                                      60          30        --                                                       61          0.08      0.1         1500                                         62          3.6       2.4                                                      63          9.4       16.5                                                     64          --        4.5                                                      65          0.28      0.75                                                     66          4.7       6                                                        67          4.4       5.6                                                      68          5         6.2                                                      69          0.5       0.2                                                      70          0.8       0.6                                                      71          1         0.8                                                      72          0.8       1                                                        73          0.6       0.8                                                      74          4         6.2                                                      75          8         --                                                       76          2.1       6.2                                                      77          2.5       6.2         >2000                                        78          6.2       --                                                       79          6.2       2                                                        80          20        25                                                       81          24        25                                                       82          9.6       12                                                       83          12.5      6.2                                                      84          3         1.3                                                      85          3         2           1000                                         86          4.5       4.8                                                      87          29        44                                                       88          12.5      33                                                       89          12.5      12.5                                                     90          3         8                                                        91          4.5       5.5         >2000                                        92          30        50                                                       93          9         6                                                        94          1.5       1           >2000                                        95          50        35                                                       96          4.7       3.6                                                      177         8         15.5                                                     97          3.9       3.2                                                      98          12.5      12.5                                                     99          50        30          >2000                                        111         0.28      --                                                       100         6.2       --                                                       101         18        --                                                       102         6.2       --                                                       103         5         6                                                        104         6.2       --                                                       105         6.2       --                                                       106         6.2       --                                                       107         --        12                                                       108         5.6       --                                                       109         0         1                                                        110         0.3       --                                                       112         0.1       0.15                                                     TOLOXATONE  60        50                                                       114         3.7       2           >2000                                        115         3.8       4.8                                                      116         1.6       0.95                                                     117         1.2       1.5                                                      118         1         0.1         >2000                                        119         --        8                                                        120         --        3                                                        121         11        8                                                        122         6.8       6.2                                                      123         2         1.4         >2000                                        124         --        0.6                                                      125         5         3.5                                                      126         4.4       1.8                                                      127         5         4.3                                                      128         7.2       4.8                                                      129         75        12                                                       130         6.2       9.6                                                      131         12        31                                                       132         3         2           >2000                                        133         6         5.2                                                      134         --        3.9                                                      135         --        4.2                                                      136         --        31                                                       137         --        6                                                        138         --        6                                                        142         18        17.5                                                     143         12.5      12                                                       144         2.2       1.1                                                      145         8.5       12                                                       146         5         12.5                                                     147         1.5       2.6                                                      148         2.2       --                                                       149         6         --                                                       152         18        15.5                                                     153         38        4                                                        154         19        17.5                                                     155         9.6       3                                                        156         0.47      0.3                                                      157         4.7       6.2                                                      158         6         6                                                        159         5.2       4.8                                                      160         --        4.2                                                      161         1.1       0.36        >2000                                        162         0.54      1.55                                                     163         1.15      8                                                        170         12.5      16                                                       171         19.5      25                                                       172         --        8.6                                                      173         --        4.7                                                      175         5.8       9.6                                                      176         4         4                                                        150         0.7       0.5                                                      151         5.2       5                                                        164         3.4       3.4                                                      165         6.8       4.7                                                      166         3.8       3.4                                                      167         3.7       3                                                        168         25        16          >1000                                        169         3         4.1         >1000                                        174         3         3.5                                                      113         3.2       3.5                                                      178         33        28          >1000                                        179         4.5       7           >1000                                        180         7.4       7.8         1000 (20%)                                   181         4         9           >1000                                        182         3.7       5.8         >1000                                        183         1.9       2.4         >1000                                        184         1.2       0.72        >1000                                        185         12        7           >1000                                        186         3         3           >1000                                        187         2.7       1.3         >1000                                        188         0.3       0.4         --                                           189         2.6       0.9         >1000                                        190         1         0.23        >1000                                        191         0.4       0.38        1000 (40%)                                   192         5.8       6           >1000                                        193         19        30          --                                           194         6.4       5.8         --                                           195         1.2       2.2         >1000                                        196         --        0.55        >1000                                        197         2.2       6.7         >1000                                        198         40        34          >1000                                        199         0.31      --          >1000                                        200         1.7       --          >1000                                        201         7.4       6.8         >1000                                        202         10        10          >1000                                        203         5.2       1.4         1000 (40%)                                   204         50        40          1000 (40%)                                   205         10.1      3           >1000                                        206         6         4.3         >1000                                        207         9.1       7.6         >1000                                        208         10        4.2         >1000                                        209         7         6.7         1000 (20%)                                   210         26        7.4         >1000                                        211         2         1.2         100 (20%)                                    212         4.3       12          1000 (40%)                                   213         3         2           1000 (100%)                                  214         0.84      1.8         1000 (40%)                                   215         6.2       10          >1000                                        216         5         3           1000 (80%)                                   217         1         1           --                                           218         7.2       13.5        >1000                                        219         7         13.5        >1000                                        220         50        50          >1000                                        234         0.6       4           >1000                                        ______________________________________                                    

As can be seen from the results shown in table IV, the compounds of formula (I) have an activity greater than that of the reference compound.

They are indicated in endogenous and exogenous depressive conditions and will be administered orally in the form of tablets, pills or capsules, at a dosage of 50 to 500 mg/day on average, of active substance.

They will also be administered in the form of an injectable solution at the rate of 5-50 mg/day of active substance, the solvent used being formed by binary or ternary mixtures containing for example water, polypropyleneglycol or polyethyleneglycol (quality: 300-400), or any other physiologically acceptable solvent, the relative porportions of the different solvents being adjusted with respect to the dose administered. 

We claim:
 1. A compound having the formula ##STR252## in which R₃ is selected from the group consisting of alkyl having 1 to 8 carbon atoms, cyclohexyl, phenyl, methoxymethyl and phenoxymethyl, and R is selected from the group consisting of n-butoxy, 3-methylbutoxy, cyclopentylmethoxy, cyclohexylmethoxy, 2-cyanoethoxy, cyanomethoxy, ##STR253## in which R₄ is hydrogen, m--Cl, m--F, p--F, m--CN or m--NO₂, and ##STR254## in which R₅ is Cl or CN.
 2. A compound as claimed in claim 1, in which R₃ is methyl and R is cyclopentylmethoxy.
 3. A compound as claimed in claim 1, in which R₃ is n-butyl and R is cyclopentylmethoxy.
 4. A compound as claimed in claim 1, in which R₃ is methyl and R is ##STR255##
 5. A compound as claimed in claim 1, in which R₃ is ethyl and R is ##STR256##
 6. A compound as claimed in claim 1, in which R₃ is alkyl having 1 to 8 carbon atoms.
 7. A compound as claimed in claim 6, in which R is ##STR257##
 8. A pharmaceutical composition for treating depression comprising a therapeutically effective amount of a compound as claimed in claim 1 and a pharmacologically acceptable carrier. 